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shuaib.khalid
Beginner

MTU Problem

Dear All,

I have a remote site connected over L3MPLS, to configure OSPF between remote site and Aggregation I created a tunnel and advertise it and LAN in OSPF. All connectivity and routes were fine but users were unable to browse any https pages even on intranet. I tried to set MTU size on both tunnel interfaces (Aggregation & Remote site) but issue not resolved. Then I put static routes via WAN and issue got resolved.

I need to configure the remote over OSPF, please help me in this regard.

1 REPLY 1
Philip D'Ath
Advisor

Try a lower MTU.  Maybe start with 1000 and verify it works.  If it does, bump it until it breaks.

You can use ping to find the actual maximum.  Just set the don't fragment option to figure it out.  Depends on which OS you have on your desktop.